英语(初)选择题hao jia fen

英语(初)选择题hao jia fen
1.
Factories must now clean their water___ away
（A．）before it throws (B.)when it throws (C.)after it is thrown
(D.)before it is thrown
2.
Wecan put our waste things in the dustbin and___it on the ground.
(A.)don't throw (b.)when it throws.(c)to not throw (d.)there are fewer
3.
if___people driving
(a.)there are a fewer(b)there are few (c.)there is few (d.)there are fewer
4.
laws(法律）are not___.
(a.)enough good(b.)ebough well(c.)good enough(d.)well enough
请说明原因最好哦,Thanks!